2. A uniform electric field is an electric field in which the field strength does not vary. This gives constant force a constant force on any charge that exists in the field. A uniform electric field is an electric field in which the field strength does not vary. This gives constant force a constant force on any charge that exists in the field. electric potential difference = work per unit charge = force x distance per unit charge = force x distance per unit charge = force per unit charge x distance = force per unit charge x distance = electric field strength x distance = electric field strength x distance V = Ed E = V/d E = V/d, with units volts/meter of volts/meter

3. Capacitor a device that stores charge made of two conductors separated by an insulator The amount of charge that a capacitor can store depends on: 1. area of conducting surface 2. distance between the conductors 3. type of insulating material link

4. Capacitance chargepotential difference the ratio of charge to potential difference C = Q/V Q = CV The SI unit of capacitance Farad F is the Farad, F, named in Michael Faraday Michael Faraday honor of Michael Faraday. Michael Faraday One Farad of capacitance means that one Coulomb of charge may be stored in the capacitor for each Volt of potential difference applied. One Farad of capacitance means that one Coulomb of charge may be stored in the capacitor for each Volt of potential difference applied.

5. Capacitor Circuits Series 1. reciprocal of the total capacitance is the sum of the reciprocals of the separate capacitors of the reciprocals of the separate capacitors 1/C T = 1/C 1 + 1/C 2 + 1/C 3 +... 2. charge is the same on each capacitor Q T = Q 1 = Q 2 = Q 3 =... 3. total potential difference is the sum of each V T = V 1 + V 2 + V 3 +... In other words, in a series circuit, capacitance adds as reciprocals, charge stays the same, and voltage adds.

6. C1C1C1C1 C2C2C2C2 C3C3C3C3 E = 12 V CT =CT =CT =CT = VT =VT =VT =VT = QT =QT =QT =QT = C1C1C1C1 C2C2C2C2 C3C3C3C3 C,  F V,VQ,  C 12 10 15

7. C1C1C1C1 C2C2C2C2 C3C3C3C3 E = 12 V C T = 4.0  F V T = 12 V Q T = 48  C C1C1C1C1 C2C2C2C2 C3C3C3C3 C,  F V,VQ,  C 12 10 15 48 4.0 4.8 3.2

8. Parallel 1. total capacitance is the sum of each separate capacitor separate capacitor C T = C 1 + C 2 + C 3 +... 2. total charge is the sum of the charges on each separate capacitor on each separate capacitor Q T = Q 1 + Q 2 + Q 3 +... 3. potential difference is the same across each capacitor each capacitor V T = V 1 = V 2 = V 3 =... In other words, in a parallel circuit, capacitance and charge add, but voltage stays the same.

9. C3C3C3C3 E = 12 V CT =CT =CT =CT = VT =VT =VT =VT = QT =QT =QT =QT = C1C1C1C1 C2C2C2C2 C3C3C3C3 C,  F V,VQ,  C 8 10 4 C2C2C2C2 C1C1C1C1

10. C3C3C3C3 E = 12 V C T = 22  F V T = 12 V Q T = 264  C C1C1C1C1 C2C2C2C2 C3C3C3C3 C,  F V,VQ,  C 8 10 4 C2C2C2C2 C1C1C1C1 12 96 120 48

11. Capacitors are often used in conjunction with resistors in simple circuits that are called RC Circuits. Click here and here to view computer here simulations of this type circuit. Explore this link to learn link more about capacitors.